After downloading the software, I had to recompile it using the new IO port define of 0xD800 since that's what the PCI card had it mapped to.

Started it up and it worked really nicely!

I did not have the card's probes hooked up to any kind of special signal but only to a stable 5V. Tested the acquisition rate and it looked promising 50KHz.

I had a simple centronics interface and it prevented me from doing anything more at this point until I get a better cable; a simple DB25 would let me jump the pins to a breadboard.

Around that time, I have also tried several other ideas attempting to use the parallel port as a data acquisition interface to analyze the TTL logic. None really worked. I mean - some of them kind of worked. At the end, I did not feel that I could do any serious logic debug by using such makeshift things.